Wrench.



R.v A.,ROSANDER.

WRENCH.

APPLICATION FILED DEc.29. I9Is.

17,299 ,5 1 O. 'i Patented Apr. 8, 1919.

III

I! III-II 27HIIIIIIIIIMMI f3' a I Ma. @1MM 'Urn ROBERT A. ROSANDER, OF BROOKLYN, NEW YORK,

Assrenoa rro Romano MACHINE AND TOOL COMPANY, A CORPORATION OF NEW YORK.

WRENCH.

Specification of Letters Patent.

Patented Apr. 8,1919.

Application led December 29, 1916. Serial No. 139,518.

T0 all whoml 'it may concern.'

Be it known that I, ROBERT A. BosANDnn, a citizen of the United States, residing in the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Wrenches, of which the following is a specification. v

The invention relates to wrenches of the adjustable jaw type, and the object of the invention is to provide a tool of this character which shall be simple in construction, easily and quickly adjusted and reliably held, adapted to serve as an ordinary monkey wrench and as a' socket wrench for engaging both hexagonal and square nuts and bolts. and also as a key wrench arranged to match the interior surfaces of hexagonal or square openings in rotatable objects thus recesse'd.

The invention consists in certain novel features and details of construction and arrang"ment by which the above objects are attained, to be hereinafter described and claimed.

The accompanying drawings form a part of this specification and show an approved form of the invention.

Figure 1 is a side elevation of the wrench with the jaws partially separated.

Fig. 2 is a corresponding plan view.

Fig. 3 is a longitudinal section taken on the line 3--3 in Fig. 2 and partly in elevation. showing the movable jaw locked 1n position.

Fig. 4 is a corresponding section through the movable aw and immediatly` adjacent parts, showing their relative positions when the movable jaw is freed for adjustment.

Fig. `5 is a transverse section, partly in elevation. the plane of section being indicated by the line 5--5 in Fig. 3.

Fig. 6 is a similar view taken on the line 6-6 in Fig. 4.

Fig. 7 is 'a top view of the locking dog alon e.

Fig. 8 is a corresponding view of the under face. l

Similar letters of reference indicate the sameparts in all the figures.

A is a bar of rectangular cross-section having rounded corners and fitted at -one end to a suitable removable handle A1; at the opposite end the bar terminates in a head B having oppositely projecting arms B1 B2 which form` the fixed jaws of the wrench.

C is a tubular sleeve adapted. to inclose and slide upon the Abar tation relatively thereto, and having oppo` sitely extended arms C1 C2 forming the movable jaws of the wrench and serving with the xed jaws B1 B2. The jaws B1 1 on the same side, are shapedon their ad# jacent faces to serve as a socket wrenchvin engaging a square nut or object and on their exterior faces to match to square recesses in a plug or other object to be turned, andthe jaws B2 C2 are shaped interiorly and exteriorly to serve correspondingly with a hexagonal nut or object or in a hexagonal recess. The cylindrical exterior of the sleeve C Vis screw-threaded and receives a tubular cy.- lyndrical Vnut or follower D. c

In thesleeve C is produced a longitudinal slot c exposing a portion of one of the plane faces of the bar A,and in the slot is a loose dog F adapted to be acted'upon by the nut D and forced into strong frietional contact with such face and thus hold the sleeve C and` its jaws C1 C2 at the desired distance from the fixed jaws B1 B?.

The dog has at one end an outwardly projecting head F1 having anv inclined outer face adapted to be acted upon by an in-.

clined Chamfer, as'at C3, inthe forward end of thernut D so that-by turning thejlatter in the direction to move it toward the jaws C1 C2 the incline of the chamfer rides upon the head F1 and` forces the head strongly 'against the face of the bar, and a movement in the reverse direction releases the head F1 and permits it to rise and disengage the bar. l

Endwise movement of the dog isprevented by the slot, Vin which it is fitted with freedom to rise and vsinkbut is held against lateral or longitudinal movement.

In the disengaged 'condition the sleeve with its aws, together with the dog Fand nut D may be slid along the barl in adjusting the jaws C1 C2 relatively to .the fixed jaws B1 2. f I

So far as yet described the operation of engaging or releasing the dog mayrequire several complete turns of the nut thus in. volving labor and time which it is the main object of this invention to save by means now to be described. The chamfer 'C3 extends only part of the circumference of the but held against roinner face of the the dog and the latter Y engagement of the nut D with 'tional surfaces It has been nut and terminates in a deeper or wider chamfer or segmentalV recess C4 occupying a relatively small part of the circumference and of such shape and depth as to permit the head F1 of the dog to lift freely and release the bar as soon as such recess is presented, and the recess is so located relatively to the dog that when the nut is turned back sufficiently to relieve the pressure on the dog the recess is thus presented and the dog completely and immediately released. In engaging the dog with the bar the nut is turned forward to carry the recess beyond is then immediately acted upon by the narrow chamfer and forced down against the face of the bar-as above described.

To insure reliable engagement of the fricthe under face of the head F1 and the adjacent plane face of the bar are scored or serrated transversely to form fine teeth or corrugations adapted to interlock. V

The body Fy of the dog is relatively thin, and the rear portion F2 terminating in an outwardly projecting spur F3 lying closely adjacent to the rear face of nut D, and the angle at F1 on the lower face of the dog formed by the junction of the body vF and rear portion F2 serves as a fulcrum on which the dog may lbe tilted in the slot c to lift or lower the head F1. Thus arranged the nut in its turning and rearward movement'to present the recess C4 to the dog to release the latter, engages the spur F3 and tilts the dog on its fulcrum F1 and automatically forces the head F1 outwardly into the recess. t

In adjusting the wrench a slight turning movement of the nut D on the sleeve C in the direction to unscrew releases the dog and permits the sleeve and its connected parts to slide freely 011 the bar A, the corrugations on the dog being held out of contact with the corrugations on the 'bar by the action of the spur F3, until the desired position is reached` then a slight partial revolution of the nut D in the direction to screw it on the sleeve, engages the dog with the bar and holds the sleeve and its connections firmly. found that a quarter revolution of the nut is sullicient to lock or release, but by making the recess C1 of `considerable length relatively to the whole circumference and chamfering all of the remaining portion a considerable allowance for wear in the screw threads is afforded so that as such wear occurs it merely requires a slightly longe:` partial revolution of the nut to compensate therefor.

Another important advantage attained byV the peculiar construction is the non-separable the sleeve C; it will be observed that the nut lies between the head F1 at one end of the dog'F andthe is inclined upwardly spur F3 at the opposite end, and that its forward and-rearward movements relatively to Vthe sleeve are limited by these projections,

so that the nut cannot be completely unscrewed and disconnected from the sleeve without first removin the bar A. This arrangement correspon'ingly insures against any misplacement or escape of 'the'dog and avoids any additional holding means for the latter or for the nut. Y l

l. In a tool of the character set forth, a bar having a jaw thereon, a screwthreaded sleeve slidably mounted on said bar and having a slot, a jaw on said sleeve, a dog received in said slot and having a head thereon with an inclined outer face, and a nut engagedv withsaid sleeve and havin@ a circumferentially extending chamfer and a circumferentially extending recess, said chamfer adapted to co-act with vsuch inclined face when said nut is turned in one direction and force said dog into engagement with said bar to lock said sleeve to said bar, and said recess arranged to receive said head when said nut is turned in the opposite direction to free said dog from said bar.

2. In a tool of the character set forth, a bar having a jaw thereon, ascrewthreaded sleeve slidably mounted on said bar and Vhaving a slot, a jaw on said sleeve,'a dogrecelved in said slot and having a head thereon with an inclined outer face, anda nut engaged withV said sleeve and having a circumferentially extending chamfer and a circ11mferentially extending recess, said chamfer adapted to co-act with such'inclined face when said nut'is turned in one direction and force said dog into engagement with said bar and lock said sleeve to said barand said recess arranged to receive said head when said nut is'turned in the opposite direction to free said dog from said dog whereby it may head into said recess. Y Y

3.' In a tool of the character set forth, a bar having a jaw-thereon, a screwthreaded sleeve slidably mounted on said' bar and having a slot, a jaw on said sleeve, a dogreceived in said slot and having a head thereon with an inclined outer face, and anut engaged with said sleeve and having a circumferentially extending chamfer and a circumferentially extending recess, said chamfer be tilted to forcesaid Vadapted to co-act with such inclinedV face said head when said bar, and means on the having a jaw thereon, a screwthreaded sleeve slidably mounted on said bar and having a slot, a 'ja-W on said Sleeve, a dog received in said slot and having a head With an inclined outer face, and a nut engaged with said sleeve and having acircu1nferentia11y extending chamfer and a circumferentially eX- tending recess, said chamfer adapted to co-act with such inclined face when said 10 nut is turned in one direction and force Said Copies of this patent may be obtained for said sleeve to said bar,

ve cents each, by addressing the Washington, D. C.

dog into engagement with said bar and lock and said recess arranged to receive said head, said dog having a spur adapted to be acted upon by said nut and tiit said do to force said head into said recess when sai nut is turned in the opposite direction.

In testimony that I claim the invention above set forth I aHiX my signature,

ROBERTA. ROSANDER.

Commissioner of Patents, 

